I was very excited about this tool and had to have it. I was very blessed to receive it for Christmas and have since recommended it to several friends, some of whom have also purchased it. I love the fact that there are so many different heads, all with many possibilities and I am very excited about the new heads that will be coming out in the spring.
Of all it's good qualities (price, versatility, ease of use, size) it does have a few drawbacks, the biggest one being that the heads are made of plastic and after only a few uses with the sew easy mat, I am finding that the piercing points are dulling already. The other drawback, although minor and overcome with practice, is that it is hard to see exactly where you are putting your holes.
Two tips to better use this tool:
1) practice a few times before using it on your layouts or cards so that you can get used to the positioning of the holes, and repractice with each new head.
2) Make sure to get the Sew Easy mat!!! I thought it was silly and a waste of money until I realized that without it, you will shorten the lifespan of the heads and the tool will become less effective. I even tried a foam mousepad upside down, and while this helped, if you are doing a 12x12 layout, well, it's just better to get the mat:)